/*
 * CountingOutputStream
 *
 * Author: Lasse Collin <lasse.collin@tukaani.org>
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 */

package org.tukaani.xz;

import java.io.IOException;
import java.io.OutputStream;

/**
 * Counts the number of bytes written to an output stream.
 * <p>
 * The <code>finish</code> method does nothing. This is
 * <code>FinishableOutputStream</code> instead of <code>OutputStream</code>
 * solely because it allows using this as the output stream for a chain of raw
 * filters.
 */
class CountingOutputStream extends FinishableOutputStream
{
  private final OutputStream out;

  private long size = 0;


  public CountingOutputStream(OutputStream out)
  {
    this.out = out;
  }


  public void write(int b) throws IOException
  {
    out.write(b);
    if (size >= 0)
      ++size;
  }


  public void write(byte[] b, int off, int len) throws IOException
  {
    out.write(b, off, len);
    if (size >= 0)
      size += len;
  }


  public void flush() throws IOException
  {
    out.flush();
  }


  public void close() throws IOException
  {
    out.close();
  }


  public long getSize()
  {
    return size;
  }
}
